Alert archive / Texas / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 821, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Aug 17, 2017, 12:10 AM CDT for Wichita County, Wilbarger County, Texas; Tillman County, Oklahoma. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 17, 2017, 12:10 AM CDT (05:10 UTC)
- Expired
- Aug 17, 2017, 12:34 AM CDT
- In force
- 24 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Tillman County, OK, Wichita County, TX, Wilbarger County, TX
The radar
The Altus AFB radar (KFDR), 25 km from the middle of the area, began a volume at 05:10 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 5.2 hours before the alert went out and 179 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2168 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1105 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 180 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 9.2
The text
As transmitted.
224
WUUS54 KOUN 170510
SVROUN
OKC141-TXC485-487-170600-
/O.NEW.KOUN.SV.W.0821.170817T0510Z-170817T0600Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
1210 AM CDT THU AUG 17 2017
The National Weather Service in Norman has issued a
* Severe Thunderstorm Warning for...
Southeastern Tillman County in southwestern Oklahoma...
Northwestern Wichita County in northern Texas...
East central Wilbarger County in northern Texas...
* Until 100 AM CDT
* At 1210 AM CDT, a severe thunderstorm was located 6 miles northeast
of Harrold, moving northeast at 20 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Haynesville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3404 9895 3415 9907 3433 9886 3425 9873
3414 9863
TIME...MOT...LOC 0510Z 231DEG 17KT 3413 9894
HAIL...<.75IN
WIND...60MPH
$$
MAHALE2 follow-up statements
497
WWUS54 KOUN 170524
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
1224 AM CDT THU AUG 17 2017
TXC487-170534-
/O.CAN.KOUN.SV.W.0821.000000T0000Z-170817T0600Z/
Wilbarger TX-
1224 AM CDT THU AUG 17 2017
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WILBARGER COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3417 9895 3421 9895 3421 9896 3420 9897
3421 9897 3422 9899 3433 9886 3425 9873
3414 9863 3407 9884
TIME...MOT...LOC 0524Z 231DEG 17KT 3417 9888
$$
OKC141-TXC485-170600-
/O.CON.KOUN.SV.W.0821.000000T0000Z-170817T0600Z/
Tillman OK-Wichita TX-
1224 AM CDT THU AUG 17 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM CDT
FOR SOUTHEASTERN TILLMAN AND NORTHWESTERN WICHITA COUNTIES...
At 1224 AM CDT, a severe thunderstorm was located 10 miles north of
Electra, moving northeast at 20 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe thunderstorm will remain over mainly rural areas of
southeastern Tillman and northwestern Wichita Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3417 9895 3421 9895 3421 9896 3420 9897
3421 9897 3422 9899 3433 9886 3425 9873
3414 9863 3407 9884
TIME...MOT...LOC 0524Z 231DEG 17KT 3417 9888
HAIL...<.75IN
WIND...60MPH
$$
MAHALE482
WWUS54 KOUN 170534
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
1234 AM CDT THU AUG 17 2017
OKC141-TXC485-170544-
/O.CAN.KOUN.SV.W.0821.000000T0000Z-170817T0600Z/
Tillman OK-Wichita TX-
1234 AM CDT THU AUG 17 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN TILLMAN AND
NORTHWESTERN WICHITA COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been cancelled.
LAT...LON 3417 9895 3421 9895 3421 9896 3420 9897
3421 9897 3422 9899 3433 9886 3425 9873
3414 9863 3407 9884
TIME...MOT...LOC 0532Z 231DEG 17KT 3420 9884
$$
MAHALEThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 7:06 PM CDT | Special Weather Statement | OUN | Foard | 24 min |
| Aug 16, 7:12 PM CDT | Severe Thunderstorm Warning | OUN | Foard | 48 min |
| Aug 16, 7:35 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Hardeman | 25 min |
| Aug 16, 7:54 PM CDT | Severe Thunderstorm Warning | OUN | Hardeman | 51 min |
| Aug 16, 8:20 PM CDT | Severe Thunderstorm Warning | OUN | Hardeman, Wilbarger | 40 min |
| Aug 16, 11:17 PM CDT | Special Weather Statement | OUN | Wilbarger | 28 min |
| Aug 16, 11:56 PM CDT | Special Weather Statement | OUN | Wilbarger | 34 min |
| Aug 17, 12:01 AM CDT | Special Weather Statement | OUN | Wichita | 29 min |
| Aug 17, 12:23 AM CDT | Special Weather Statement | OUN | Wilbarger | 37 min |
| Aug 17, 1:14 AM CDT | Special Weather Statement | OUN | Clay, Wichita, Wilbarger | 46 min |
| Aug 17, 1:21 AM CDT | Severe Thunderstorm Warning | OUN | Clay, Wichita | 24 min |
| Aug 17, 1:39 AM CDT | Severe Thunderstorm Warning | OUN | Clay, Wichita | 51 min |
| Aug 17, 2:27 AM CDT | Special Weather Statement | OUN | Clay | 63 min |
| Aug 16, 7:10 PM CDT | Special Weather Statement | OUN | Garfield | 35 min |
| Aug 16, 7:18 PM CDT | Special Weather Statement | OUN | Blaine | 27 min |
| Aug 16, 7:27 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Kay, Noble | 63 min |
| Aug 16, 7:32 PM CDT | Special Weather Statement | OUN | Custer | 28 min |
| Aug 16, 7:35 PM CDT | Special Weather Statement | OUN | Blaine | 25 min |
| Aug 16, 7:47 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Custer | 58 min |
| Aug 16, 8:02 PM CDT | Special Weather Statement | OUN | Kingfisher | 28 min |
| Aug 16, 8:11 PM CDT | Severe Thunderstorm Warning | OUN | Kingfisher | 34 min |
| Aug 16, 8:18 PM CDT | Severe Thunderstorm Warning | OUN | Logan, Noble, Payne | 27 min |
| Aug 16, 8:23 PM CDT | Severe Thunderstorm Warning | OUN | Washita | 52 min |
| Aug 16, 8:45 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Caddo, Canadian, Custer, Kingfisher, Logan and 1 more | 60 min |
| Aug 16, 8:46 PM CDT | Severe Thunderstorm Warning | OUN | Noble, Payne | 59 min |
| Aug 16, 8:52 PM CDT | Special Weather Statement | OUN | Greer, Washita | 23 min |
| Aug 16, 9:09 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Greer, Kiowa, Washita | 36 min |
| Aug 16, 9:18 PM CDT | Special Weather Statement | OUN | Oklahoma | 27 min |
| Aug 16, 9:25 PM CDT | Special Weather Statement | OUN | Lincoln | 35 min |
| Aug 16, 9:37 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Cleveland, Grady, McClain, Oklahoma | 38 min |
| Aug 16, 9:42 PM CDT | Special Weather Statement | OUN | Payne | 33 min |
| Aug 16, 9:44 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Grady, Greer, Jackson, Kiowa, Washita | 61 min |
| Aug 16, 9:50 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Payne | 55 min |
| Aug 16, 9:56 PM CDT | Special Weather Statement | OUN | Oklahoma | 34 min |
| Aug 16, 9:59 PM CDT | Areal Flood Advisory | OUN | Canadian, Oklahoma | 2 hr |
| Aug 16, 10:00 PM CDT | Areal Flood Advisory | OUN | Caddo, Kiowa, Washita | 3 hr |
| Aug 16, 10:14 PM CDT | Special Weather Statement | OUN | Cleveland, McClain | 31 min |
| Aug 16, 10:43 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Kiowa | 47 min |
| Aug 16, 10:47 PM CDT | Special Weather Statement | OUN | Cleveland, Grady, McClain, Pottawatomie | 28 min |
| Aug 16, 10:57 PM CDT | Special Weather Statement | OUN | Comanche | 33 min |
| Aug 16, 10:59 PM CDT | Special Weather Statement | OUN | Tillman | 31 min |
| Aug 16, 11:07 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche | 25 min |
| Aug 16, 11:27 PM CDT | Areal Flood Advisory | OUN | Caddo, Comanche, Garvin, Grady, McClain, Stephens | 3 hr |
| Aug 16, 11:29 PM CDT | Special Weather Statement | OUN | Garvin, McClain, Pottawatomie, Seminole, Stephens | 61 min |
| Aug 16, 11:44 PM CDT | Special Weather Statement | OUN | Cotton | 31 min |
| Aug 17, 12:27 AM CDT | Special Weather Statement | OUN | Carter, Coal, Garvin, Hughes, Johnston, Murray and 3 more | 63 min |
| Aug 17, 12:40 AM CDT | Special Weather Statement | OUN | Comanche, Cotton | 35 min |
| Aug 17, 12:47 AM CDT | Areal Flood Advisory | OUN | Carter, Comanche, Cotton, Garvin, Grady, Murray and 1 more | 3 hr |
| Aug 17, 1:28 AM CDT | Special Weather Statement | OUN | Atoka, Bryan, Carter, Coal, Johnston, Love and 3 more | 62 min |
| Aug 17, 3:43 AM CDT | Areal Flood Advisory | OUN | Bryan, Johnston, Marshall | 3 hr |
| Aug 17, 4:18 AM CDT | Flash Flood Warning | OUN | Bryan, Johnston, Marshall | 3 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 2017Severe Thunderstorm Warnings in Oklahoma, 2017Every severe thunderstorm warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.